X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=src%2Fmodel%2FCollisionBounds.hpp;fp=src%2Fmodel%2FCollisionBounds.hpp;h=15c4fe10ade6ed89344ebed1cdea5cd18aa4dff3;hb=b61d462707dd3d40a32a6104d88eb24f6a52df63;hp=0000000000000000000000000000000000000000;hpb=eba29c8ad489194cd1e3cd64b5f23424ad4384ef;p=blank.git

diff --git a/src/model/CollisionBounds.hpp b/src/model/CollisionBounds.hpp
new file mode 100644
index 0000000..15c4fe1
--- /dev/null
+++ b/src/model/CollisionBounds.hpp
@@ -0,0 +1,103 @@
+#ifndef BLANK_MODEL_COLLISIONBOUNDS_HPP_
+#define BLANK_MODEL_COLLISIONBOUNDS_HPP_
+
+#include "../graphics/BlockMesh.hpp"
+#include "../graphics/EntityMesh.hpp"
+#include "../graphics/OutlineMesh.hpp"
+
+#include <glm/glm.hpp>
+
+
+namespace blank {
+
+class AABB;
+class Ray;
+
+struct CollisionBounds {
+
+	/// the number of vertices (and normals) this shape has
+	size_t VertexCount() const noexcept { return vtx_pos.size(); }
+	/// the number of vertex indices this shape has
+	size_t VertexIndexCount() const noexcept { return vtx_idx.size(); }
+
+	const EntityMesh::Normal &VertexNormal(size_t idx) const noexcept { return vtx_nrm[idx]; }
+	EntityMesh::Normal VertexNormal(
+		size_t idx, const glm::mat4 &transform
+	) const noexcept {
+		return EntityMesh::Normal(transform * glm::vec4(vtx_nrm[idx], 0.0f));
+	}
+
+	/// fill given buffers with this shape's elements with an
+	/// optional transform and offset
+	void Vertices(
+		EntityMesh::Buffer &out,
+		float tex_offset = 0.0f
+	) const;
+	void Vertices(
+		EntityMesh::Buffer &out,
+		const glm::mat4 &transform,
+		float tex_offset = 0.0f,
+		EntityMesh::Index idx_offset = 0
+	) const;
+	void Vertices(
+		BlockMesh::Buffer &out,
+		const glm::mat4 &transform,
+		float tex_offset = 0.0f,
+		BlockMesh::Index idx_offset = 0
+	) const;
+
+	/// the number of vertices this shape's outline has
+	size_t OutlineCount() const { return out_pos.size(); }
+	/// the number of vertex indices this shape's outline has
+	size_t OutlineIndexCount() const { return out_idx.size(); }
+
+	/// fill given buffers with this shape's outline's elements
+	void Outline(OutlineMesh::Buffer &out) const;
+
+	/// Check if given ray would pass though this shape if it were
+	/// transformed with given matrix.
+	/// If true, dist and normal hold the intersection distance and
+	/// normal, otherwise their content is undefined.
+	virtual bool Intersects(
+		const Ray &,
+		const glm::mat4 &,
+		float &dist,
+		glm::vec3 &normal
+	) const noexcept = 0;
+
+	/// Check for intersection with given OBB.
+	/// The OBB is defined by box and box_M, M is applied to the shape.
+	virtual bool Intersects(
+		const glm::mat4 &M,
+		const AABB &box,
+		const glm::mat4 &box_M,
+		float &depth,
+		glm::vec3 &normal
+	) const noexcept = 0;
+
+protected:
+	void SetShape(
+		const EntityMesh::Positions &pos,
+		const EntityMesh::Normals &nrm,
+		const EntityMesh::Indices &idx);
+	void SetTexture(
+		const BlockMesh::TexCoords &tex_coords);
+	void SetOutline(
+		const OutlineMesh::Positions &pos,
+		const OutlineMesh::Indices &idx);
+
+private:
+	EntityMesh::Positions vtx_pos;
+	EntityMesh::Normals vtx_nrm;
+	EntityMesh::Indices vtx_idx;
+
+	BlockMesh::TexCoords vtx_tex_coords;
+
+	OutlineMesh::Positions out_pos;
+	OutlineMesh::Indices out_idx;
+
+};
+
+}
+
+#endif